JP7044401B2 - Wood processing equipment, wood processing quality judgment method, and wood processing quality judgment program - Google Patents

Description

The present disclosure relates to a wood processing apparatus, a wood processing quality determination method, and a wood processing quality determination program.

An apparatus has been proposed in which wood is cut to a certain thickness while being transported and inspected to keep the thickness within a desired standard (see, for example, Patent Document 1).

JP-A-2002-103306

Originally, the transport speed of wood is generally constant, but the actual transport speed differs between wood that is being cut and wood that is only transported after being released from cutting, and the former is relatively relative. It will be slower, and the latter will be relatively faster. In the quality judgment of the plate thickness, the index of how long the state exists, not whether there is a defective thickness locally and accidentally, is a condition for the quality judgment. .. However, if the transport speed is not constant, the reliability of the length detection value becomes low.

In view of these problems, it is an object of the present invention to more accurately detect the amount of movement of the conveyed wood in the processing of wood.

The present disclosure includes the following inventions. However, the present invention is defined by the scope of claims.

(Wood processing equipment)
The present disclosure is a wood processing device that performs processing to make the plate thickness uniform while transporting wood, and determines whether the plate thickness is good or bad.
A plate thickness sensor provided in the middle of the wood transport path to detect the plate thickness,
A first transport device provided on the upstream side in the transport direction with respect to the plate thickness sensor to transport the wood, and a first transport device.
A cutting device provided on the upstream side of the plate thickness sensor to perform cutting on the wood, and a cutting device.
A first sensor provided on the upstream side of the plate thickness sensor and detecting the amount of movement of the wood in the transport direction, and a first sensor.
A second transport device provided on the downstream side in the transport direction with respect to the plate thickness sensor to transport the wood, and a second transport device.
A second sensor provided on the downstream side of the plate thickness sensor and detecting the amount of movement of the wood in the transport direction, and a second sensor.
It is provided with a state in which the plate thickness of the wood deviates from the permissible range, and a control unit for determining the quality of the plate thickness based on the length in which the state exists in the transport direction.
The control unit calculates the movement amount of the wood based on the first sensor for a portion of the wood having a predetermined length from the front end in the transport direction, and for the subsequent portions, the second portion. Calculate the movement amount based on the sensor,
It is a wood processing device.

(How to judge the quality of wood processing)
The present disclosure is a method for determining the quality of wood processing by a wood processing device that performs cutting processing to make the plate thickness uniform while transporting the wood and determines the quality of the plate thickness.
The plate thickness sensor detects the plate thickness of the wood, and the movement amount is detected based on the first sensor and the second sensor on the upstream side and the downstream side in the transport direction with respect to the plate thickness sensor, respectively.
The quality of the plate thickness is determined based on the state in which the plate thickness of the wood deviates from the allowable range and the length in which the state exists in the transport direction.
The movement amount of the wood is calculated based on the first sensor for a portion of the wood having a predetermined length from the front end in the transport direction, and for other portions, the movement amount is calculated based on the second sensor. Calculate the amount of movement,
This is a method for judging the quality of wood processing.

(Good / bad judgment program for wood processing)
The present disclosure is a wood processing quality determination program by a wood processing device that performs cutting processing to make the plate thickness uniform while transporting wood and determines the quality of the plate thickness.
A function to detect the thickness of wood by the plate thickness sensor and to detect the amount of movement based on the first sensor and the second sensor on the upstream side and the downstream side in the transport direction with respect to the plate thickness sensor, respectively.
A function for determining the quality of the plate thickness based on the state in which the plate thickness of the wood deviates from the permissible range and the length in which the state exists in the transport direction.
The movement amount of the wood is calculated based on the first sensor for a portion of the wood having a predetermined length from the front end in the transport direction, and for other portions, the movement amount is calculated based on the second sensor. A function to calculate the amount of movement and
It is a good / bad judgment program of wood processing to realize the above in a computer.

According to the present disclosure, in the processing of wood, the amount of movement of the transported wood can be detected more accurately.

FIG. 1 is a side view of a main part of the wood processing apparatus according to the embodiment of the present disclosure. FIG. 2 is an enlarged view of the vicinity of the plate thickness sensor of FIG. 1, and shows a state when the rear end of the preceding workpiece is detected. FIG. 3 is an enlarged view of the vicinity of the plate thickness sensor of FIG. 1, and shows a state when the front end of the subsequent work is detected. FIG. 4 is an enlarged view of the vicinity of the plate thickness sensor of FIG. 1, and is a diagram showing a state in which the sensor for detecting the movement amount changes from the first sensor on the upstream side to the second sensor on the downstream side. FIG. 5 is a flowchart showing an example of the process executed by the control unit.

<< Configuration of wood processing equipment >>
FIG. 1 is a side view of a main part of the wood processing apparatus according to the embodiment of the present disclosure. As shown by XYZ in the figure, the transport direction is the X direction, the height direction of the device is the Y direction, and the width direction of the device is the Z direction. In FIG. 1, the timbers 1 and 2 (hereinafter referred to as works 1 and 2) roughly processed into flat plates of a predetermined length are conveyed from the right side to the left side of the figure. Assuming that the entire device is a wood processing device 300, the upstream side in the transport direction is the wood cutting machine 100, and the remaining downstream side is the plate thickness inspection device 200.

In the wood cutting machine 100, in order from the upstream side, the carry-in roller 3 that sandwiches the work 1 from above and below and pulls in the work 1, the lower surface cutting roller 4 that cuts the lower surface of the work 1, and the work 1 when viewed from above. It includes a side surface cutting roller 5 that cuts both left and right side surfaces, a top surface cutting roller 6 that cuts the upper surface of the work 1, and a transfer roller 7 that sandwiches the work 1 from above and below and conveys it downstream. The carry-in roller 3 and the transfer roller 7 constitute a first transfer device in the wood cutting machine 100.

The plate thickness inspection device 200 includes a first sensor 8, an end sensor 9, a plate thickness sensor 10, a second sensor 11, a carry-out roller 12 that sandwiches the work 2 from above and below, and a work-passing roller 12. It is provided with a passage sensor 13 for detecting the above, a carry-out conveyor 14, and marking guns 15 and 16 for marking defective products.

The first sensor 8 and the second sensor 11 are, for example, rotary encoders, and output the number of pulses according to the movement amount of the works 1 and 2. The end sensor 9 is, for example, a light emitting / receiving type optical sensor, and detects the front end and the rear end of the work. The passage sensor 13 detects the moment when the work 1 or 2 passes.

The plate thickness sensors 10 are arranged symmetrically in the vertical direction with respect to the works 1 and 2. The pair of upper and lower plate thickness sensors 10 is, for example, a laser distance sensor, and detects a distance in the Y direction. The upper plate thickness sensor 10 detects the distance d1 from itself to the upper surfaces of the works 1 and 2, and the lower plate thickness sensor 10 detects the distance d2 from itself to the back surfaces of the works 1 and 2. The plate thickness can be measured by obtaining D− (d1 + d2) from the distance D (fixed value) between the upper and lower plate thickness sensors 10. The plate thickness sensor 10 extends continuously (or discretely) in the width direction (Z direction), and can also detect the widths of the works 1 and 2.

The marking gun 15 sprays paint on a defect in the end of the wood (near the end before and after the work). The marking gun 16 sprays paint on defects other than the end of the wood. The unloading roller 12 and the unloading conveyor 14 constitute a second transport device in the plate thickness inspection device 200.

The output signals of the first sensor 8, the end sensor 9, the plate thickness sensor 10, the second sensor 11, and the passing sensor 13 are sent to the control unit 20. The operation of the marking guns 15 and 16 is controlled by the control unit 20. The control unit 20 includes, for example, a computer, and the computer executes software (computer program) to realize necessary control functions. The software is stored in the storage unit 20m of the control unit 20. The computer program can be stored in various storage media such as a semiconductor memory, a hard disk, an SSD (Solid State Drive), a magnetic disk, an optical disk, and a USB memory. The operation unit 21 is, for example, a touch panel, and the operator can give necessary instructions from the operation unit 21 to the control unit 20.

The work 1 conveyed from the upstream is cut to a constant thickness and width by the lower surface cutting rollers 4, the side surface cutting rollers 5 and 6, and the upper surface cutting rollers 6. Here, especially with respect to the thickness, there may be a partial dent depending on the original characteristics of the wood. Therefore, it is inspected how much the plate thickness is missing with respect to the total length.

When the plate thickness sensor 10 detects a plate thickness defect (outside the allowable range of a desired value), the plate thickness inspection device 200, for example, shows how long the total length is with respect to the total length of one work. It detects an index of whether it exists or how many places are continuously present on one work piece. If any one of the indicators exceeds the threshold value, it is determined to be a defective product.

<< Measurement of movement amount by two sensors >>
Next, the significance of the first sensor 8 and the second sensor 11 used for measuring the movement amount will be described. 2 to 4 are enlarged views of the vicinity of the plate thickness sensor 10 of FIG. 1. First, in the transport state until the state shown in FIG. 2, the control unit 20 measures the movement amount in the vicinity of the end of the rear part of the work 2 based on the pulse generated by the second sensor 11 according to the movement amount of the work 2. is doing. Therefore, the control unit 20 accurately measures the amount of movement of the rear portion of the work 2 released from the cutting process based on the output of the second sensor. When the state shown in FIG. 2 is reached, the end sensor 9 detects the rear end of the work 2.

FIG. 3 shows a state in which the transport of the works 1 and 2 is slightly advanced from that of FIG. In this state, the end sensor 9 detects that the front end of the work 1 has arrived from the upstream side. The work 1 in this state is still being machined. At this time, the control unit 20 changes the sensor for measuring the movement amount from the second sensor 11 to the first sensor 8.

FIG. 4 is a diagram showing a state in which the transport of the work 1 is further advanced by the amount of movement L from the state of FIG. The movement amount L in FIG. 4 is determined by the control unit 20. The movement amount L is set to be after the moment when the work 1 is released from the cutting by the lower surface cutting roller 4 (FIG. 1), the side surface cutting roller 5 (FIG. 1), and the upper surface cutting roller 6 (FIG. 1). Set. The operator can arbitrarily set the numerical value of the movement amount L from the operation unit 21 (FIG. 1) to the control unit 20 (FIG. 1). When the movement amount from the front end detection is less than L, the control unit 20 measures the movement amount based on the pulse generated by the first sensor 8 according to the movement amount of the work. When the movement amount reaches L, the control unit 20 measures the movement amount based on the pulse generated by the second sensor 11 in accordance with the movement amount of the work instead of the first sensor 8.

"flowchart"
FIG. 5 is a flowchart showing an example of the processing performed by the control unit 20. With respect to the first machined work, the control unit 20 measures the amount of movement of the front part of the work based on the first sensor 8 (step S1). When the end sensor 9 detects the arrival of the tip of the work (step S2), the thickness is measured based on the plate thickness sensor 10 (step S3). The plate thickness sensor 10 also measures the width of the work (step S4).

Next, when the movement amount obtained based on the first sensor 8 reaches L, the detection source of the movement amount is switched from the first sensor 8 to the second sensor 11. The work at this time is released from the cutting process. Then, when the plate thickness is not within the allowable range, the amount of movement of the rear part of the work is measured based on the second sensor 11 (step S5). Here, when the plate thickness is not within the allowable range of the desired thickness, the control unit 20 determines the length (continuous length, or, if it appears intermittently, the total length thereof, etc.). Ask. After the end sensor 9 detects the rear end of the work (step S6), the control unit 20 determines whether the processed work is a non-defective product or a defective product (step S7) and stores it.

Next, when the passage sensor 13 detects the passage of the work (steps S8 and S10), the control unit 20 marks the defective product with the marking gun 15 or 16 (step S9). In the case of a defect in the end of the wood, marking is performed by the marking gun 15, and in the case of a defect other than the end of the wood, marking is performed by the marking gun 16. As for the form of marking, different markings are performed depending on the cause of the defect, and the reason for the defect can be visually confirmed.

On the other hand, if it is determined to be a non-defective product, the control unit 20 does not perform marking and allows the work to pass as it is. After that, the same process is repeated.

<< Summary of Disclosure >>
The above disclosure can be generalized and expressed as follows.

The wood processing apparatus 300 performs processing to make the plate thickness uniform while transporting the wood, and determines whether the plate thickness is good or bad. The wood processing device 300 is provided in the middle of the wood transport path, and is provided on the upstream side of the board thickness sensor 10 for detecting the board thickness and the board thickness sensor 10 in the transport direction, and transports the wood. A transport device (3, 7), a cutting device (4, 5, 6) provided on the upstream side of the plate thickness sensor 10 for cutting wood, and an upstream side of the plate thickness sensor 10. A first sensor 8 for detecting the amount of movement of wood in the transport direction, and a second transport device (12, 14) provided on the downstream side of the plate thickness sensor 10 in the transport direction for transporting wood. A second sensor 11 provided on the downstream side of the plate thickness sensor 10 to detect the amount of movement of wood in the transport direction, a state in which the plate thickness of wood deviates from the permissible range, and the state in which the state is in the transport direction. It includes a control unit 20 for determining whether the plate thickness is good or bad based on the existing length.

The control unit 20 calculates the movement amount based on the first sensor 8 for a portion of the wood having a predetermined length (L) from the front end in the transport direction, and the second sensor for the subsequent portions. The movement amount is calculated based on 11.

In such a wood processing device, even if the transfer speeds of the first transfer device (3, 7) and the second transfer device (12, 14) are originally the same, whether the wood is being cut or from the cutting process. The actual transport speed differs depending on whether it is in the released state. Therefore, for wood that is presumed to be released from cutting, the amount of movement is measured by the second sensor 11 on the downstream side in the same way as the second transfer device (12, 14), and cutting is in progress. For the wood in a state presumed to be, the movement amount is measured by the first sensor 8 on the upstream side in the same manner as the first transport device (3, 7). This makes it possible to appropriately select a sensor capable of measuring a more accurate movement amount according to the actual transport speed. As a result, the quality of the plate can be determined more accurately. In particular, it is possible to more accurately determine the quality of the plate thickness in the vicinity of the edge of the wood (the end of the wood).

It is desirable that the predetermined length (L) can be arbitrarily set for the control unit 20.
In this case, the timing at which the wood is released from the cutting process can be appropriately set according to the actual state.

Further, an end sensor capable of detecting the rear end and the front end of the wood may be provided between the plate thickness sensor 10 and the first sensor 8.
In this case, since the end sensor can detect the front end of the wood to be conveyed next faster than the plate thickness sensor, the switching from the second sensor to the first sensor can be performed without delay.

From the viewpoint as a method, this is a method for determining the quality of wood processing by the wood processing apparatus 300, which performs cutting processing to make the plate thickness uniform while transporting the wood, and determines the quality of the plate thickness. Then, (i) the plate thickness sensor 10 detects the plate thickness of the wood, and the plate thickness sensor 10 is based on the first sensor 8 and the second sensor 11 on the upstream side and the downstream side in the transport direction, respectively. The movement amount is detected, and the quality of the plate thickness is determined based on (ii) the state in which the plate thickness of the wood deviates from the allowable range and the length in which the state exists in the transport direction, and (iii) the wood. , The movement amount is calculated based on the first sensor 8 for a portion having a predetermined length (L) from the front end in the transport direction, and the movement amount is calculated based on the second sensor 11 for other portions. calculate.

In wood processing equipment, cutting is performed upstream of transportation and plate thickness inspection is performed downstream, but depending on whether the wood is being cut or released from cutting, it is practically The transport speed is different. Therefore, for wood that is presumed to be free from cutting, the amount of movement is measured by the second sensor 11 on the downstream side, and for wood that is presumed to be cutting. Measures the amount of movement by the first sensor 8 on the upstream side. This makes it possible to appropriately select a sensor capable of measuring a more accurate movement amount according to the actual transport speed. As a result, the quality of the plate can be determined more accurately. In particular, it is possible to more accurately determine the quality of the plate thickness in the vicinity of the edge of the wood (the end of the wood).

The present disclosure can also be expressed as a program. That is, it is a wood processing quality determination program by the wood processing apparatus 300 that performs cutting processing to make the plate thickness uniform while transporting the wood and determines the quality of the plate thickness. A function of detecting the plate thickness and detecting the amount of movement based on the first sensor 8 and the second sensor 11 on the upstream side and the downstream side in the transport direction with respect to the plate thickness sensor 10, respectively, and (b) wood. A function to determine the quality of the plate thickness based on the state in which the plate thickness deviates from the permissible range and the length in which the state exists in the transport direction, and (c) a predetermined position from the front end of the wood in the transport direction. A computer (a function to calculate the movement amount based on the first sensor 8 for the part of the length (L) and the movement amount based on the second sensor 11 for the other parts) is provided. This is a wood processing quality determination program to be realized by the control unit 20).

In wood processing equipment, cutting is performed upstream of transportation and plate thickness inspection is performed downstream, but depending on whether the wood is being cut or released from cutting, it is practically The transport speed is different. Therefore, for wood that is presumed to be free from cutting, the amount of movement is measured by the second sensor 11 on the downstream side, and for wood that is presumed to be cutting. Measures the amount of movement by the first sensor 8 on the upstream side. This makes it possible to appropriately select a sensor capable of measuring a more accurate movement amount according to the actual transport speed. As a result, the quality of the plate can be determined more accurately. In particular, it is possible to more accurately determine the quality of the plate thickness in the vicinity of the edge of the wood (the end of the wood).

The above program may exist in the form of a storage (recording) medium that stores the program.

《Supplementary note》
It should be noted that the embodiments disclosed this time are exemplary in all respects and are not restrictive. The scope of the present invention is indicated by the scope of claims and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1, 2, wood (work)
3 Carry-in roller 4 Bottom cutting roller 5 Side cutting roller 6 Top surface cutting roller 7 Conveying roller 8 1st sensor 9 End sensor 10 Plate thickness sensor 11 2nd sensor 12 Carrying roller 13 Passing sensor 14 Carrying out conveyor 15, 16 Marking gun 20 Control Part 20m Storage part 21 Operation part 100 Wood cutting machine 200 Plate thickness inspection device 300 Wood processing device

Claims (5)

It is a wood processing device that performs processing to make the plate thickness uniform while transporting wood, and judges whether the plate thickness is good or bad.
A plate thickness sensor provided in the middle of the wood transport path to detect the plate thickness,
A first transport device provided on the upstream side in the transport direction with respect to the plate thickness sensor to transport the wood, and a first transport device.
A cutting device provided on the upstream side of the plate thickness sensor to perform cutting on the wood, and a cutting device.
A first sensor provided on the upstream side of the plate thickness sensor and detecting the amount of movement of the wood in the transport direction, and a first sensor.
A second transport device provided on the downstream side in the transport direction with respect to the plate thickness sensor to transport the wood, and a second transport device.
A second sensor provided on the downstream side of the plate thickness sensor and detecting the amount of movement of the wood in the transport direction, and a second sensor.
It is provided with a state in which the plate thickness of the wood deviates from the permissible range, and a control unit for determining the quality of the plate thickness based on the length in which the state exists in the transport direction.
The control unit determines the amount of movement of the wood from the front end in the transport direction to the portion of the length from the front end of the wood until the wood is released from the cutting process by the cutting device , based on the first sensor. The amount of movement is calculated based on the second sensor for the subsequent parts.
Wood processing equipment. The wood processing apparatus according to claim 1, wherein the predetermined length can be arbitrarily set for the control unit. The wood processing apparatus according to claim 1 or 2, wherein an end sensor capable of detecting the rear end and the front end of the wood is provided between the plate thickness sensor and the first sensor. It is a method of determining the quality of wood processing by a wood processing device that performs cutting processing to make the plate thickness uniform while transporting wood and determines the quality of the plate thickness.
The plate thickness sensor detects the plate thickness of the wood, and the movement amount is detected based on the first sensor and the second sensor on the upstream side and the downstream side in the transport direction with respect to the plate thickness sensor, respectively.
The quality of the plate thickness is determined based on the state in which the plate thickness of the wood deviates from the allowable range and the length in which the state exists in the transport direction.
The movement amount is calculated based on the first sensor for the portion of the wood having a length from the front end in the transport direction until the wood is released from the cutting process, and for the other portions. The movement amount is calculated based on the second sensor.
How to judge the quality of wood processing. It is a wood processing quality judgment program by a wood processing device that performs cutting processing to make the plate thickness uniform while transporting wood and determines the quality of the plate thickness.
A function to detect the thickness of wood by the plate thickness sensor and to detect the amount of movement based on the first sensor and the second sensor on the upstream side and the downstream side in the transport direction with respect to the plate thickness sensor, respectively.
A function for determining the quality of the plate thickness based on the state in which the plate thickness of the wood deviates from the permissible range and the length in which the state exists in the transport direction.
The movement amount is calculated based on the first sensor for the portion of the wood having a length from the front end in the transport direction until the wood is released from the cutting process, and for the other portions. The function of calculating the movement amount based on the second sensor and
A good / bad judgment program for wood processing to realize the above on a computer.

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